| Premier Building Contracts Limited | Construction | 2020 |
| Premier Clay Targets Ltd | Arts & recreation | 2018 |
| Premier Property Services (Armagh) Ltd | Real estate | 2005 |
| Pretty Eyes Lash Supplies Ltd | Other services | 2023 |
| Prime Electricity Limited | Energy | 2017 |
| Primestock Meats | Agriculture & fishing | 2016 |
| Pristine Roofing & Guttering Ltd | Construction | 2025 |
| Probate Direct (NI) Limited | Professional & scientific | 2025 |
| Procastangling Limited | Wholesale & retail | 2022 |
| Procon Carpentry Ltd | Construction | 2014 |
| Procon Properties Ltd | Construction | 2018 |
| Procon Skyhire Ltd | Construction | 2018 |
| Propork Ltd | Agriculture & fishing | 1995 |
| Protec Machinery Ireland Ltd | Manufacturing | 2016 |
| PRR Associates Ltd | Professional & scientific | 2015 |
| Prunty Peat Limited | Manufacturing | 1984 |
| Pure Melter Ltd | Professional & scientific | 2024 |
| PVC Modern Marble Limited | Wholesale & retail | 2025 |
| Q&R Holdings Limited | Financial services | 2021 |
| Quiet MAN Bars Limited | Extraterritorial | 2012 |
| Quill & Craft Media Limited | Arts & recreation | 2021 |
| Quillgrove NI Ltd | Construction | 2018 |
| Quinn Coaches Armagh Ltd | Transport & logistics | 2017 |
| R & P Electrical Ltd | Construction | 2026 |
| R & R C Bond Wholesale (Northern Ireland) Ltd | Wholesale & retail | 2026 |
| R a Paynter Ltd | Wholesale & retail | 2007 |
| R Doran Transport Ltd | Transport & logistics | 2019 |
| R G Professional Services Ltd | Professional & scientific | 2014 |
| R J Park Contracts Ltd | Construction | 2026 |
| R M Improvements Limited | Construction | 2008 |
| R&D Tree Felling Ltd | Agriculture & fishing | 2023 |
| R&S Farms Ltd | Agriculture & fishing | 2021 |
| Rachel Taylor Co Ltd | Professional & scientific | 2026 |
| Radv Property NI Ltd | Real estate | 2026 |
| Raff Electrics Ltd | Construction | 2023 |
| Rafferty Stone Ltd | Manufacturing | 2021 |
| Raffles (Armagh) Ltd | Hospitality | 2025 |
| Railway Viaduct Ltd | Real estate | 2019 |
| RAM Engineering/Slurry Spec NI Ltd | Manufacturing | 2020 |
| Rammac Sales Ltd | Wholesale & retail | 2026 |
| Ramose Holdings Ltd | Real estate | 2022 |
| Rangeview Limited | Real estate | 2018 |
| Raphex Commerce Ltd | Wholesale & retail | 2025 |
| Raphex Property Ltd | Real estate | 2024 |
| Ratarnet Investment Limited | Administrative & support | 2019 |
| Rathclea Construction Ltd | Construction | 2016 |
| Ravenhill Auto Commercials Ltd | Wholesale & retail | 2018 |
| Ravenhill Farms Ltd | Agriculture & fishing | 2026 |
| RAY Contracts Ltd | Construction | 2019 |
| RC Technical Services Ltd | Construction | 2022 |
| RDE Ltd | Construction | 2020 |
| React-Reconciliation, Education and Community Training Ltd | Other services | 2024 |
| Rebel Irish Distillers Ltd | Wholesale & retail | 2024 |
| Rebenna Ltd | Real estate | 2025 |
| Recruitment 33 Ltd | Administrative & support | 2019 |
| Red Barns Transport Limited | Transport & logistics | 2012 |
| Red Lion Service Solutions Ltd | Wholesale & retail | 2019 |
| Red Lion T&A Ltd | Manufacturing | 2018 |
| Redial Recycling Limited | Wholesale & retail | 2018 |
| Redian Real Estate Armagh Ltd | Real estate | 2024 |
| Redian Real Estate Ltd | Real estate | 2020 |
| Redmond Property Armagh Limited | Real estate | 2023 |
| Redrock Development Partnership | Administrative & support | 2011 |
| Redrock Engineering Limited | Manufacturing | 2012 |
| Redrock Environmental Limited | Extraterritorial | 2014 |
| Redrock LLD Limited | Real estate | 2021 |
| Redrock Machinery Group Limited | Professional & scientific | 2011 |
| Redrock Machinery Limited | Manufacturing | 2010 |
| Redrock Trailers Limited | Manufacturing | 2021 |
| Redwood Armagh Ltd | Manufacturing | 2018 |
| Redwood Timber Craft Ltd | Manufacturing | 2022 |
| Reim Training Solutions Limited | Information & communication | 2014 |
| Rental Property Services Limited | Real estate | 2024 |
| Restore IT Building Services Ltd | Administrative & support | 2022 |
| Reveal Business Ltd | Professional & scientific | 2018 |
| RG Woodwork Ltd | Manufacturing | 2025 |
| Rice & Gaffney Developments Limited | Wholesale & retail | 2006 |
| Rice Bros Limited | Extraterritorial | 1979 |
| Rice Family Farm Ltd | Financial services | 2026 |
| Richmond Fabrications Ltd | Manufacturing | 2024 |
| Ridgeview Solutions Ltd | Wholesale & retail | 2025 |
| Riding for the Disabled Association (Armagh) Limited | Health & social care | 2014 |
| Ring Fort Ltd | Construction | 2018 |
| Ripple Creative Limited | Professional & scientific | 2019 |
| River Blackwater Catchment Trust | Agriculture & fishing | 2013 |
| Riverview Farm Holdings Ltd | Financial services | 2025 |
| RJ & EE Properties Limited | Construction | 2018 |
| RJ Alarms (INT) Ltd | Administrative & support | 2013 |
| RJ Alarms LLP | | 2020 |
| Rkwt Ltd | Arts & recreation | 2023 |
| Rlmni Management Ltd | Real estate | 2025 |
| RM Clothing Limited | Wholesale & retail | 2025 |
| RM Electrical & Poultry Services Ltd | Manufacturing | 2024 |
| RM Logistics Ltd | Transport & logistics | 2023 |
| RMC Holdings Limited | Financial services | 2016 |
| RML Transport Ltd | Extraterritorial | 2022 |
| Road Tankers Armagh Ltd | Manufacturing | 2013 |
| Road Tankers Limited | Transport & logistics | 2020 |
| Robinson Property Development Limited | Real estate | 2005 |
| Rock Enterprises (NI) Limited | Construction | 2014 |